Qt之网络通信，适用TCP,UDP连接

代码：

#include "SocketApp.h"

SocketApp::SocketApp(QString strIP,QString strNetModel , int iPort)
	:onNum(0),
	m_strNetModel(strNetModel),
	isCheckServer(true),
	isServer(true),
	isCheckClient(false)
{
	recvSize = 0;
	sendSize = 0;
	m_TcpSocket = NULL;
	m_UdpSocket = NULL;
	mServer = NULL;
	m_strIP = strIP;
	m_iPort = iPort;
	StartBtSocket();
}

SocketApp::~SocketApp()
{

}
//与newconnection信号关联
void SocketApp::accept_connect()
{
	m_TcpSocket = mServer->nextPendingConnection(); //返回与客户端连接通信的套接字
	clients.append(m_TcpSocket);
	connect(m_TcpSocket, SIGNAL(readyRead()), this, SLOT(recv_data()));
	//关联掉线信号
	connect(m_TcpSocket, SIGNAL(disconnected()), this, SLOT(client_disconnect()));
}

//接收数据
void  SocketApp::recv_data()
{
	QTcpSocket *obj = (QTcpSocket*)sender();
	//获取发送数据端的IP
	QString ip = obj->peerAddress().toString();
	ip.remove("::ffff:");
	QString msg = obj->readAll();
	recvSize += msg.size();//统计接收到的数据的字节数
	newCommandAccept(msg);
}

void SocketApp::client_disconnect()
{
	QTcpSocket *obj = (QTcpSocket*)sender();//获取掉线对象
	if (isServer)
	{
	
		int row = clients.indexOf(obj);//找到掉线对象的内容所在的行
		clients.remove(row);//从容器中删除对象

							//掉线时删除在线数量
		onNum--;
	}
	else
	{
	}
}


//客户端连接成功
void SocketApp::connect_suc()
{
}
//发送数据
void SocketApp::sendData()
{
	if (m_strNetModel == "TCP")
	{
		if (m_TcpSocket == NULL)
			return;
		quint64 len = m_TcpSocket->write(m_strAction.toLocal8Bit());
		if (len > 0)
		{
			sendSize += len;//统计发送的字节数

		}
	}
	else
	{		
		QByteArray msg = QString::fromLocal8Bit("发送指令").toLocal8Bit();
		m_UdpSocket->writeDatagram(msg, QHostAddress(m_strIP), m_iPort);
	}
}

//启动服务器或者链接服务器
void SocketApp::StartBtSocket()
{
	if (isServer) //服务器
	{
		mServer = new QTcpServer();
		bool bRet = mServer->listen(QHostAddress(m_strIP), m_iPort);//启动服务器监听

		//关联新客户端链接信号
		connect(mServer, SIGNAL(newConnection()), this, SLOT(accept_connect()));
	}
	if (isServer == false) //客户端
	{
		m_TcpSocket = new QTcpSocket();
		//检测链接成功信号
		connect(m_TcpSocket, SIGNAL(connected()), this, SLOT(connect_suc()));
		//设置服务器的 ip和端口号
		//m_TcpSocket->connectToHost();

		//关联接收数据信号
		connect(m_TcpSocket, SIGNAL(readyRead()), this, SLOT(recv_data()));
		//关联掉线信号
		connect(m_TcpSocket, SIGNAL(disconnected()), this, SLOT(client_disconnect()));
	}

	m_UdpSocket = new QUdpSocket;
	bool bRet = m_UdpSocket->bind(QHostAddress(m_strIP), 8000);
	connect(m_UdpSocket, SIGNAL(readyRead()), this, SLOT(receive()));
}
void SocketApp::receive()
{
	QByteArray ba;
	while (m_UdpSocket->hasPendingDatagrams())
	{
		ba.resize(m_UdpSocket->pendingDatagramSize());
		m_UdpSocket->readDatagram(ba.data(), ba.size());
		newCommandAccept(QString(ba.data()));
	}
}

//关闭服务器或者断开
void SocketApp::on_closeBt_clicked()
{
	if (isServer)//服务器
	{
		//关闭所有服务器之后开始按钮才能启用
		mServer->close();
	}
	else //客户端
	{
		m_TcpSocket->close();//关闭客户端
	}
}

void SocketApp::setCurrentNetModel(QString str)
{
	m_strNetModel = str;
}
void SocketApp::setCurrentAction(QString str)
{
	m_strAction = str;
}

bool SocketApp::checkCurrentIPAndPort(QString strIP,int iPort)
{
	if (m_strIP == strIP && m_iPort == iPort)
	{
		return true;
	}
	else
	{
		return false;
	}
	
}